mfd: twl: Convert to use maple tree register cache

The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

drivers/mfd/twl-core.c

@@ -314,7 +314,7 @@ static const struct regmap_config twl4030_regmap_config[4] = {
 
 		.reg_defaults = twl4030_49_defaults,
 		.num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
-		.cache_type = REGCACHE_RBTREE,
+		.cache_type = REGCACHE_MAPLE,
 	},
 	{
 		/* Address 0x4a */